Would this do good to seal a usb port with a usb cord plugged in?

Not sure why you need to seal a USB PORT but I see no reason it wouldnt keep it waterproofed.

Is this stuff good for polyureathane bushings

Yes it is good for polyurethane bushings.....the lube they sell for the bushings is essentially rebranded dielectric grease too.

Has anyone tried this on fishing reel components? Is it light enough?

Definitely! I've been using it from 15 yrs or more... The main purpose, to seal the reel and protect screws from salt; for those that are not stainless I fill the hole with the grease to the top well, every where there is a screw head facing out. And all around the edge and bound surface of the gear cover, anywhere water can sip in! And in the gears, but I would mix it with other type to soften a bit for smooth reeling experience.

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MISSION AUTOMOTIVE Dielectric Silicone Paste Waterproof Marine Grease (8 Oz)

MISSION AUTOMOTIVE Dielectric Silicone Paste Waterproof Marine Grease (8 Oz)

4.8/5

Product ID: 223792514

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Details

Material
Silicone
Brand
MISSION
Package Information
Tube
Liquid Volume
237
Item Weight
8 Ounces

💧100% Waterproof Seal

🔥High Flash Point 570°F

🇺🇸Proudly Made in USA

Description

💧 Stay Dry, Stay Ahead – The Marine Grease Pros Trust!

TRUSTED AMERICAN QUALITY - Manufactured in the USA with premium materials for consistent, professional-grade results every time.
HEAT RESISTANT PERFORMANCE - Withstands extreme temperatures up to 570°F, ensuring reliable lubrication and protection under pressure.
PRECISION APPLICATION TUBE - Easy-to-use 8 oz tube designed for mess-free, targeted application on electrical and marine components.
ULTIMATE MARINE PROTECTION - Silicone-based paste that locks out water and prevents corrosion in the harshest marine environments.
MULTI PURPOSE MARINE GREASE - Ideal for electrical connectors, marine equipment, and any environment where waterproof lubrication is critical.

MISSION AUTOMOTIVE Dielectric Silicone Paste is a premium 8 oz waterproof marine grease designed to protect electrical and marine equipment from corrosion and moisture. Made in the USA, it features a high flash point of 570°F and a silicone-based formula that ensures durable, heat-resistant lubrication in demanding environments.

Specifications

Material	Silicone
Brand	MISSION AUTOMOTIVE
Package Information	Tube
Liquid Volume	237 Millilitres
Item Weight	8 Ounces
Recommended Uses For Product	marine equipment, electrical components
Flash Point	570 Degrees Fahrenheit
Specific Uses For Product	Prevent Corrosion, Lubricate in Marine Environments
Item Form	Paste
Net Quantity	236.59 Milliliters
UPC	638037142402
Package Dimensions	11.94 x 6.27 x 6.1 cm; 226.8 g
Item model number	8542064566
Manufacturer Part Number	08946
Water Resistance	Waterproof
Country of Origin	USA
Item Weight	226 g

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Great price for an authentic product. Fast international shipping too!

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TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

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